forgive cosigner of student loan when student dies while paying

I have four children. They told me that because I have some retirement savings I can't get any kind of help. My beautiful daughter Emily died In July 2012. I am paying for three other children who will if they live, pay their own loans. But I will have to die younger myself now because I will be forced to use the very little retirement money I do have to pay salie Mae loans for my deceased daughter who attended rutgers and loved it so much. I lost both jobs I had just weeks before my daughters car accident and have trouble finding a new job at my age. Please pressure sallie Mae to forgive cosigners who are already punished by the loss of their precious children